.page-faq {
  --faq-line: rgba(159, 176, 184, 0.22);
  --faq-stroke: rgba(159, 176, 184, 0.42);
  position: relative;
  display: block;
  padding: clamp(22px, 3.6vw, 44px) 0 clamp(56px, 9vw, 110px);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(159, 176, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 176, 184, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  color: var(--mist);
  font-family: var(--font-sans);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq a {
  color: inherit;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  margin: 0 0 clamp(18px, 2.6vw, 30px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-faq .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .breadcrumbs__link {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .breadcrumbs__link:hover,
.page-faq .breadcrumbs__link:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-faq .breadcrumbs__sep {
  color: var(--muted);
}

.page-faq .breadcrumbs [aria-current="page"] {
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  margin: 0 0 clamp(30px, 4.6vw, 58px);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  font-size: clamp(2.1rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--mist);
  transform: skewX(-1.8deg);
  transform-origin: left center;
}

.page-faq .faq-hero__lede {
  max-width: 56ch;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding-left: clamp(14px, 2vw, 20px);
  border-left: 3px solid var(--signal);
  font-size: clamp(0.98rem, 1.4vw, 1.1rem);
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__media {
  margin: clamp(26px, 4vw, 42px) 0 0;
  border: var(--edge) solid var(--faq-stroke);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-faq .faq-hero__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 分类标签条 ---------- */
.page-faq .faq-seg {
  margin: 0 0 clamp(30px, 4.4vw, 54px);
  padding: clamp(14px, 2vw, 20px) 0;
  border-top: var(--edge) solid var(--faq-stroke);
  border-bottom: var(--edge) solid var(--faq-stroke);
}

.page-faq .faq-seg__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-seg__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: var(--edge) solid var(--faq-stroke);
  border-radius: 0;
  background: var(--panel);
  color: var(--silver);
  font-size: 0.86rem;
  font-weight: 600;
  line-height: 1.3;
  text-decoration: none;
  transition: color 0.18s var(--ease), background 0.18s var(--ease),
    border-color 0.18s var(--ease), transform 0.18s var(--ease),
    box-shadow 0.18s var(--ease);
}

.page-faq .faq-seg__link:hover,
.page-faq .faq-seg__link:focus-visible {
  color: var(--ink);
  background: var(--signal);
  border-color: var(--signal);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-signal);
}

.page-faq .faq-seg__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--signal);
}

.page-faq .faq-seg__link:hover .faq-seg__num,
.page-faq .faq-seg__link:focus-visible .faq-seg__num {
  color: var(--ink);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  position: relative;
  margin: 0 0 clamp(34px, 5vw, 64px);
  padding: 0 0 clamp(30px, 4.4vw, 56px);
  border-bottom: var(--edge) solid var(--faq-line);
  scroll-margin-top: 96px;
}

.page-faq .faq-group--last {
  border-bottom: 0;
  padding-bottom: 0;
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  column-gap: clamp(12px, 2vw, 22px);
  margin-bottom: clamp(18px, 2.8vw, 30px);
  padding-bottom: 14px;
  border-bottom: var(--edge) solid var(--faq-stroke);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.6vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--signal);
  opacity: 0.55;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.45rem, 3.2vw, 2.15rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.005em;
  color: var(--mist);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 8px 0 0;
  max-width: 54ch;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 问题条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  position: relative;
  border: var(--edge) solid var(--faq-line);
  border-radius: 0;
  background: var(--panel);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease),
    transform 0.2s var(--ease);
}

.page-faq .faq-item:hover {
  transform: translate(-2px, -2px);
  border-color: var(--faq-stroke);
}

.page-faq .faq-item[open] {
  border-color: var(--signal);
  box-shadow: var(--shadow-signal);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px 16px 22px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(0.96rem, 1.6vw, 1.06rem);
  font-weight: 600;
  line-height: 1.5;
  color: var(--mist);
}

.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--faq-stroke);
  transition: background 0.2s var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::before {
  background: var(--signal);
}

.page-faq .faq-item__qtext {
  min-width: 0;
}

.page-faq .faq-item__mark {
  flex: none;
  width: 11px;
  height: 11px;
  border-right: var(--edge) solid var(--signal);
  border-bottom: var(--edge) solid var(--signal);
  transform: rotate(45deg);
  transition: transform 0.22s var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(-135deg);
}

.page-faq .faq-item__a {
  padding: 0 22px 20px 22px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-item__a p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 214, 255, 0.42);
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 设备同步配图 ---------- */
.page-faq .faq-group__media {
  margin: clamp(20px, 3vw, 28px) 0 0;
  border: var(--edge) solid var(--faq-stroke);
  background: var(--deck);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-faq .faq-group__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 结尾指引 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(34px, 5vw, 60px);
  padding: clamp(24px, 4vw, 44px);
  border: var(--edge) solid var(--signal);
  background:
    linear-gradient(135deg, rgba(0, 229, 168, 0.1), rgba(18, 28, 27, 0.98) 58%),
    var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-cta .eyebrow {
  margin: 0 0 12px;
}

.page-faq .faq-cta__title {
  margin: 0 0 12px;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--mist);
}

.page-faq .faq-cta__text {
  max-width: 56ch;
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--silver);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 620px) {
  .page-faq .faq-hero h1 {
    transform: none;
    letter-spacing: -0.01em;
  }

  .page-faq .faq-seg__link {
    flex: 1 1 calc(50% - 8px);
    justify-content: flex-start;
    padding: 8px 10px;
    font-size: 0.8rem;
  }

  .page-faq .faq-item__q {
    padding: 14px 14px 14px 18px;
    gap: 12px;
  }

  .page-faq .faq-item__a {
    padding: 0 18px 18px 18px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 6px;
  }

  .page-faq .faq-group__num {
    font-size: 1.1rem;
  }

  .page-faq .faq-group__note {
    grid-column: 1;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-group--duo {
    display: grid;
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.88fr);
    column-gap: clamp(24px, 3.5vw, 48px);
  }

  .page-faq .faq-group--duo > .faq-group__head {
    grid-column: 1 / -1;
  }

  .page-faq .faq-group--duo > .faq-list {
    grid-column: 1;
  }

  .page-faq .faq-group--duo > .faq-group__media {
    grid-column: 2;
    grid-row: 2;
    align-self: start;
    position: sticky;
    top: 28px;
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__q::before,
  .page-faq .faq-seg__link,
  .page-faq .breadcrumbs__link {
    transition: none;
  }
}